Question :
Students of three different classes appeared in common examination. Pass average of 10 students of first class was 70%, pass average of 15 students of second class was 60% and pass average of 25 students of third class was 80% then what will be the pass average of all students of three classes?
1. 74%
2. 75%
3. 69%
4. 72%
Answer :
4 - 72%
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